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RW. ROBINSON. STRAW STAGKBR.

'No. 535,296. Patented Mar. 5;1895.

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NI'IE .TATES' FRANCIS W. ROBINSON, OF RICHMOND, INDIANA, ASSIGNOR TO THE ROBINSON do COMPANY, OF SAME PLACE.

ST RAW-STACKER.

SPECIFICATION forming part of Letters Patent No. 535,296, dated March '5, 1895.

Application filed December 5, 1894.- fierial No. 530,897. (No model.)

To aZZ whom, it may concern-.-

Be it known that I, FRANCIS W. ROBINSON, a citizen of the United States, residing at Richmond, in the county of Wayne and State of Indiana, have invented certain new and useful Improvements in Straw-Stackers, of which the following is a specification.

My invention has reference to straw stackers or straw stacking attachments for use in connection with thrashing machines, and more particularly to that class of such devices known as pneumatic or wind stackers.

It relates to the mounting of the trunk and to the means for rendering it telescopic, or variable in length. I have devised a novel and eflicient way of holding, guiding and supporting the rotatable turn table which carries the trunk or chute; and have simplified and made'more efficient the means for moving and adjusting the movable outer telescopic trunk section upon the inner section.

I will first describe my improvements by reference to the accompanying drawings and will then point out in the claims those features which I believe to be new and of my own invention.

In the drawings Figurel is a side elevation of a mechanism embodying my improvements. Fig. 2 is an enlarged plan of the turn table. Fig. 3 is a section on line 3-3 Fig. 2, showing also in section the stump, or extreme lower end, of the trunk or chute. Fig. 4 is a section on an enlarged scale, and in the line of its axis, of the hood operating reel. Fig. 5 is an axial section of the spring device by which the hood is caused, when permitted, to swing qr turn in a direction opposite to that in which it is swung, by the reel.

The turn table A is annular and has as usual upon its rim, worm teeth to engage its driving worm B which is operated in the usual manner. This annular turn table heretofore has, so far as I am informed, been supported by devices applied to its inner edge. Under my invention it is supported at its outer edge or rim, the rim for this purpose being received between the horizontal flanges c of pulleys or anti friction revoluble wheels O mounted upon vertical axes cl in housings D. There may be any suitable number of these wheels.

In practice I find three are sufficient. They are placed around the exterior of the turn table at equal distances apart, and they serve most effectually to support the turn table as well as to steady its movements and to prevent it from any lateral slip. The periphery of that part of the wheels which runs in contact with the rim of the turn table is shaped to fit snugly the general contour of the rim (in vertical section). One advantage attending the arrangement is that I am enabled to attach the stump E of the trunk or chute directly to the turn table, by fitting the lower end of the stump over an annular flange on the turn table, and then directly bolting the two together, as indicated in Fig. 3, instead of connecting the 'two together by stay rods extending from the upper end of the stump to the turn table, as is necessary when the turn table supporting devices are applied to the inner edge of the table.

The shaft B of the driving worm B, is sup ported at the end which carries the worm, in two bearings 19 1) between which the worm is placed, and these bearings'have horizontal lips or flanges b b which extend inwardly so as to overhang the rim of the turn table and serve to hold down the table against the weight of the rearwardly extending trunk,

thus relieving the flanged antifriction wheels 0 from the excessive strain which might otherwise come upon them.

F is theinner trunk section which is mounted upon the stump Eto swing up and down thereon as usual, and is provided with the customary derrick arrangementf.

G is the outer or telescopic section arranged to slide back and forth on the inner section for the purpose of varying the workinglength of the trunk.

In the position in which the parts are shown in Fig. 1, the sections are closed upon one another to shorten as far as possible the length of the trunk. In this position, the inner section extends to the end of the outer section, and it has beyond that a semi-circular extension f surrounding which is a similar semicircular extension of the outer section. When the outer section is extended fully its rear end is very near the front tubular end of the inner section, and the object of the extension f is to afiord the requisite bearing for the outer section under these conditions.

The outer section is moved lengthwise of the other, by means of a wire rope h or the like, one end of which is made fast to a post h on the rear end of the outer section. This rope thence extends back to a drum 7L around which it makes several turns to prevent slip, thence passes forward to and around a pulley 71 on a post 72- attached to the rear or inner section, and thence extends back to the rear end of a guide rod or pipe 71 to which it is attached. This rod passes loosely through a guide eye or hole in the post M, and is attached to the post h as well as to a second post 72 at the front of the outer section G. By turning the drum the outer section will be moved lengthwise in one direction or the other upon the inner section according to the direction of rotation of the drum. The guide rod assures and steadies the outer section during the movement and prevents it from rotating upon the inner section.

The hood H at the outer end of the outer section G, turns upon an axis zand is adjusted by means of a cord or rope K operated from the base of the stacker by means of a reel I upon which it is wound. The working length of this operating cord should vary according to the variations in the working length of the trunk. To this end I construct the reel I so that it will automatically give or render the cord when the trunk is extended. For this purpose the reel is friction held being mounted loosely upon an axle Z and held thereon between a shoulder Z and a friction disk Z pressed against the reel by a spiral spring Z encircling the axle, the degree of compression of which is regulated by an adjusting nut Z screwing upon the axle. Under this arrangement when the outer section is extended the reel I will automatically render enough of cord is to permit this movement. When the outer section is drawn in, the slack of cord is of course taken up by turning the reel by hand.

The cord it turns the hood H in one direction only. To turn it in the other direction I provide a spring actuated device, shown in Fig. 5, which tends constantly to turn the hood in a direction opposite to that in which it is pulled by the operatingcord k. In this device the axle Z is heldimmovably to the extension 9 of the outer section G and upon it is loosely hung the hood. Surrounding the axle is a spiral spring m received in a cylindrical housing n and having one of its ends attached to the hood and its other end attached to the housing. The housing 92 at its closed outer end is fashioned as a nut n which screws upon the screw-th readed outer end of the axle i and beyond this point, is a separate lock nut 72*. By turning the housing nut, the tension of the spring m can be adjusted to the re.- quired point. In extending the outer section, the, spring m will of course give before the friction reel I does, so that the cord 70 will pull down the hood to its full extent, before the friction reel renders; but when once the proper length of trunk is obtained, it is a matter of a moment only to turn the reel so as to readjust the hood to desired position.

It will be noted that between the posts it and 77. extends an inclined rod h which is higher at rear than at front, and from the post it extends the taut wire cable or rope h at a downward inclination to the drum h at rear. These devices form a truss like structn re which is of material assistance in giving stability to the trunk when it is in extended condition.

Having now described my improvements and the best way now known to me of carrying the same into eifect, what I claim herein as new and of my own invention is as follows:

1. In combination with the worm-toothed turn-table, and its operating worm, the antifriction wheels for supporting said turntable journaled upon Vertical axes and Placed around or upon the exterior of the turn table, and provided with peripheral flanges between which the rim of the turn table fits and is supported and held.

2. In combination with the worm toothed turn table, the antifriction wheels for supporting said turn table journaled upon vertical axes around or upon the outside of the turn table, and provided with peripheral flang s between wh ch the rim of he table fits and is supported and held, and the worm and worm shaft supported in bearings having inwardly prOjecting flanges, which overhang the turn table, substantially as and for the purposes hereinbefore set forth.

3.' The combination of the inner trunk section F, the outer telescopic longitudinally movable section G, the rope h fast at one end to the rear end of section G and at the other end to the rear end of a rod h connected to nd xten ing earw r ly fr m he ect said rope extending from the point to which it is attached to the rear section back to and around. an operating Windlass or drum on the inner section F, thence forward to and around a pulley on said section F, and th nce back to rod 72 under the arrangement and for joint operation, as hereinbefore shown and described.

4. The combination with the inner section F, and the outer slidable telescopic section G, of the hinged hood carried by said outer section, a frictionally held reel on the inner section, a cord extending from said reel to the hood for moving the latter in one direction, and a spring device which tends to move the hood in a direction Opposite to that in which it is moved by the cord, substantially as and for the purposes hereinbefore set forth.

5. The combination of the inner section F, the outer slidable telescopic section G; the guide rod 7& attached to section G and extending back through a guide eye or sleeve on the inner section F; the Windlass or drum 71 the IIO rope h fast to a post on the rear end of the outer section and extending thence back to and around the Windlass forward to and around pulley h on section F and back to rod h; and the inclined rod k under the arrangement and for joint operation substantially as hereinbefore set forth.

6. The toothed annular turn table and the trunk or chute stump attached directly to the inner rim of the same, in combination with anti-friction wheels journaled upon ver- 

